(a) in the engr 10 lab (e391), there are 50 long light bulbs (p=100 w) and 30 regular bulbs (p=60 w). how much energy is consumed lighting the lab during the 3 hour lab period. calculate the amount of energy saved if all bulbs are replaced by cfl (spiral) bulbs (p=25w). (3 points) san josé state universitye10 introduction to engineeringe10 introduction to engineering | energy power |page 3 of 3 (b) continuing from (a), calculate the amount of natural gas (ft3) needed to provide the energy to keep the lights (long + regular) in the e391 lab on overnight for a month (10 hours per day for 30 days)? in other words, how much extra energy (in terms of cubic feet of natural gas) does sjsu have to purchase when we don’t turn off the lights in a lab. (note: you’ll have to look up the energy in one ft3 of natural gas and cite your source) (3 points)

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

gravitational energy

electrical energy

kinetic energy

ligh energy

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome